import java.util.Random;
 public class Main {
     private static class MyThread extends Thread {
         @Override
         public void run() {
             Random random = new Random();
             while (true) {
                 // 打印线程名称
                 System.out.println(Thread.currentThread().getName());
                 try {
                     // 随机停止运行 0-9 秒
                     Thread.sleep(random.nextInt(10));
                 } catch (InterruptedException e) {
                     throw new RuntimeException(e);
                 }
             }
         }
     }

     public static void main(String[] args) {
         MyThread t1 = new MyThread();
         MyThread t2 = new MyThread();
         MyThread t3 = new MyThread();
         t1.start();
         t2.start();
         t3.start();
         Random random = new Random();
         while (true) {
             // 打印线程名称
             System.out.println(Thread.currentThread().getName());
             try {
                 Thread.sleep(random.nextInt(10));
             } catch (InterruptedException e) {
                 // 随机停止运行 0-9 秒
                 e.printStackTrace();
             }
         }
     }
 }

